bromide GRE

Carbon tetrabromide was prepared from acetone and sodium hypobromite by adding tetrabutylammonium bromide.The yield and purity were very satisfactory.

向次酸钠溶液中滴加适量的丙酮,在丁基铵催下,高产率得碳。

Trimethylaluminum(TMA),usually used in organic catalysis and organic synthesis,was synthesized by reaction of triethylaluminium (TEA) with methyl bromide on iron-stibonium complex catalyst.

用新的催体系(铁-锑复合催剂)催三乙基铝(TEA)与甲烷进行烷基交换反应合成三甲基铝(TMA)。

TEM, ethidium bromide displacement assays, agarose gel electrophoresis and SAXS studies support the formation of lipoplexes for the transfection of CHO cells.

【文献摘要】A new transfection reagent based on nucleoside phosphocholine amphiphile leading to high transfection efficacy and low cytotoxicity is described.

Methods Infrared spectrophotometry with potassium bromide tabletting was adopted,in which the extract was carried out with the absolute alcohol as the solvent.

方法以无水乙醇为溶剂进行提取,采用红外分光光度法(压片)进行定性鉴别。

Bromobutyraldehyde ethylene acetal was synthesized from crotonaldehyde by addition with hydrogen bromide and then acetalation with ethylene glycol with an overall yield of 80.

巴豆醛先与氢加成,再与乙二醇缩醛得3-代丁醛缩乙二醇,收率80.8%。

Using 2-acetyl benzimidazole and sodium bromide as raw material,2-(dibromine acetyl)-benzimidazole hydrobromate was synthesized with the new bromine that displaced by chlorine gas in light.

以2-乙酰基苯并咪唑和钠为原料,在光照条件下用氯气置换出钠中的素,合成兽药噻苯咪唑中间体-2-(二乙酰基)-苯并咪唑氢酸盐。

The phenols were O-alkylated with 100% conversion and 100% selectivities using phenacyl bromide and benzyl bromide as alkylating reagents.

用代苯乙酮和苄为烷基试剂,以高产率和100%的转率以及100%的选择性得了酚的O-烷基产物。

The cocktail used generally contains sodium thiopental (to anaesthetise the condemned man), pancuronium bromide (to paralyse his muscles) and potassium chloride (to stop his heart).

一般注射用的混合针剂含有硫喷妥钠（麻醉犯人），泮库铵（麻痹犯人肌肉）和氯（停止犯人心跳）。

By 52%-54% denisty indicator of lithium bromide, it is used to be absorptive refrigerant, hypnagogue and mitigative of medicine, and also to be electrolyte in ion-battery.

52%-54%浓度的锂用作吸收式制冷剂。在医药中，用作催眠剂和镇静剂。还用作锂电池的电解质。

The paper studied the preparation of bromine from basic Magnesium bromide in the production of maltol and ethyl maltol, the synthesis of bromethyl from bromine, sulfur and alcothol.

研究了以麦芽酚、乙基麦芽酚生产中的碱式镁废渣为原料制取;以、硫和乙醇合成乙烷的方法。

Through the research on petroleum and nature gas, design a multi-source heatpump of single and double effect lithium bromide, the two stage heatpump unit, process of nature gas liquefaction etc.

通过对石油天然气物性的研究,利用热泵机组的特点,设计多源单效制冷供热热泵机组、双效热泵机组、双级热泵机组及天然气液流程。